摘要
随着矿井煤炭资源的不断开采利用,煤炭品质逐渐降低,原有的工艺生产性能降低。为探究最佳生产方案,选用矿井中原煤进行筛分浮沉实验,并对主要洗选设备重介质旋流器、弛张筛、TDS智能干选机做单机工艺性能检测,得到重介质旋流器数量效率分别达到97.49%,弛张筛下层筛面总错配物含量M_(O)=8.2%,TDS分选机的矸石带煤率5.26%,煤中带矸率16.92%,排矸率为77.69%,总错配物含量为11.90%,针对检测结果分析洗选设备存在的问题并提出建议。原煤粒度分布均匀灰分中等,含矸量偏高,多有泥化现象,精煤灰分应控制在30%;重介质旋流器运行过程中应控制好重介质旋流器中介质悬浮液密度以及介质桶中介质悬浮液密度和液位;张弛筛下层筛面筛分效率尚可,但临近难筛粒度物含量较高,生产中仍要进一步加强管理,提高操作水平,其次应当控制细粒级含量与入料水分,尽可能减少细粒级物料与结团物料的产生;TDS分选机的煤中带矸率明显高于标准值,应提高对TDS分选机的日常维护,及时检查线阵及物料上的异物,严格控制入料水分,建立完善的粉尘过滤及处理系统,以提高TDS分选机的分选效率。
With the continuous exploitation and utilization of coal resources in mines,the quality of coal is gradually reduced,and the production performance of the original process is reduced.In order to explore the best production plan,the raw coal in the mine was selected for screening float and sink experiment,and the process performance of the main washing equipment heavy medium cyclone,relaxation sieve and TDS intelligent dry separator was tested.It was found that the quantity efficiency of heavy medium cyclone reached 97.49%respectively,and the total mismatch content of the screen surface under the relaxation sieve was M_(O)=8.2%.The coal carrying rate of gangue,the coal carrying rate of gangue in the TDS separator is 5.26%,the coal carrying rate of gangue in the coal is 16.92%,the discharge rate of gangue is 77.69%,and the total mismatch content is 11.90%.According to the test results,the problems existing in the washing equipment are analyzed and suggestions are put forward.The original coal exhibits a uniformly distributed particle size with a moderate ash content,higher gangue content,and frequently presents a mud phenomenon.The ash content of the clean coal should be kept within 30%.During the operation of the heavy medium cyclone separator,it is crucial to maintain control over the suspension density of the medium in the cyclone and the medium density and level in the medium barrel.The lower sieve surface of the vibrating screen shows acceptable separation efficiency,but there is a higher content of difficult-to-screen particles nearby,necessitating further enhancement in production management and operational proficiency.Additionally,it is essential to regulate the content of fine particles and incoming moisture,aiming to minimize the generation of fine-grade materials and agglomerates.The reject rate of gangue in the TDS separator significantly exceeds the standard value,necessitating improved daily maintenance,timely inspection of the array and foreign materials on the material line,strict control over incom
作者
周建国
宋万军
白龙
张国强
李振宇
王磊
张鑫
张耀杰
张传祥
李小龙
ZHOU Jianguo;SONG Wanjun;BAI Long;ZHANG Guoqiang;LI Zhenyu;WANG lei;ZHANG Xin;ZHANG Yaojie;ZHANG Chuanxiang;LI Xiaolong(Shangyuquan coal mine of state energy group Guoshen company,Xinzhou 036500,China;Ordos institute of technology,Ordos 017000,China;Henan Polytechnic University Ordos Research Institute of Clean Coal Development and Utilization,Ordos 017000,China;Science and Technology Talent Bureau of Ordos High Tech Industrial Development Zone,Ordos 017000,China)
出处
《洁净煤技术》
CAS
CSCD
北大核心
2024年第S01期515-520,共6页
Clean Coal Technology
关键词
洗选设备
工艺性能
筛分
浮沉
检测
washing equipment
process performance
sieving
float and sink
detection
